May 12, 2025 KLONG CPS Design Meeting

Meeting Time and Place

Monday, May 12, 2025, 10:30am TED 2561b

• Invited - Hovanes Egiyan, Stephanie Worthington, Keith Harding, Pavel Degtiarenko, Tim Whitlatch, Josh Ballard

Agenda

• Review minutes from last meeting https://halldweb.jlab.org/wiki/index.php/August_13,_2024_KLONG_CPS_Design_Meeting
• FSD Detector
  • FSD detector upstream of CPS
• Power supply status -
• Magnet update (Josh/Stephanie)
• Copper cooling update -
  • CPS Absorber Prototype Test
• Beamline upstream of magnet
  • 370um beryllium window with 4.5" flange available -
  • Collimator layout
  • Magnetic shielding
  • FSD detector
• Absorber shielding layout
• Lead brick painting is 60% done and all due back in October
  • Additional 1200 painted lead bricks in PR system
• DeGauss test -
• Working on ANSYS transient thermal and FLUENT/CFX models

Minutes

Pavel went over his shielding and power deposition plots and we discussed the implementation of them into the design. The shielding layout we supplied to Pavel is acceptable with a 12" thick borated poly shield around the absorber going down close to the floor. There is no poly below the assembly and downstream and upstream can be thinner (6"). Nominally, we will put a 2" steel plate below the assembly close to the floor which will count as shielding, air caster support and borated poly support.

We are in general agreement that the power deposition and associated temperatures in the 20% radiator nominal and narrow beam configurations are acceptable. There are still some questions on relative power absorption compared to the 10% radiator.